Marbleized Glass Tumblers
Using the glass paint's unique consistency, this whirly-twirly look is achieved by slowly rotating the glass while swirling the paint.
Source: Martha Stewart
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Prepare an area where your painted glass can dry for several hours. Work over a newspaper-covered surface.
Prepare your glasses by washing them with warm water and soap, then use rubbing alcohol to wipe away any remaining residue from the surface. Dry your glass piece completely before continuing.
Using Martha Stewart Crafts Stencil Tape, mark off an area at least 0.8 inch wide at the top of the glass.
A marbleized surface is achieved by allowing paints of different colors to flow together and “marble” on the surface being painted. To get your paint to a flowing consistency, squeeze a generous amount of Gloss Transparent Texture paint in the color of your choice into a bowl or paper cup. Then pour an equal amount of fill medium into the container with your paint. Use a spoon or spatula to mix the two liquids together gently to avoid air bubbles. Mix until the liquid is uniform in color and its consistency will coat the spoon but pours easily.
After mixing is complete, pour paint into an empty Martha Stewart Crafts refillable 2 oz. bottle. Alternatively, you may spoon paint directly from your mixing bowl. Beginning with the color of your choice, squeeze bottle and pour paint directly onto the surface in sections of varying sizes. Turn glass as you work and alternate colors to achieve the desired marbleized effect.
Once glass is completely coated with paint, continue turning to swirl paint further, if desired. Use a pin to pop any air bubbles while the paint still wet.
Let dry for several hours. In order to allow excess paint to drip off completely, elevate the glass slightly by resting it on a small raised surface. (Tip: the plastic ring inside a roll of tape, or the clear plastic cap from the paint bottle work perfectly for this!)
Allow paint to dry for at least three hours. Using a craft knife, score along each taped edge in order to cleanly release tape. Remove tape slowly.